Summary:In the bleak days of the Cold War, espionage veteran George Smiley is forced from semi-retirement to uncover a double agent in the ranks of the British Secret Service. Pushed into retirement by a scandal caused by the now-deceased head of service, a guy named Control, and because he suspected that there was a spy, Smiley journeys through the labyrinthine world of the British spy service layer by layer as he hunts the mole controlled by the mysterious Russian spymaster Karla.